Showing papers in "International Journal of Mechanical Sciences in 2020"

TL;DR: A probabilistic framework is proposed for fatigue life assessment of notched components under size effects, in which the Smith–Watson–Topper damage parameter is utilized to characterize the multiaxial stress state at the notch tip.

TL;DR: In this paper, a unified method is developed to analyze free vibrations of laminated functionally graded shallow shells reinforced by graphene platelets (GPLs) under arbitrary boundary conditions is proposed.

TL;DR: In this article, dual-material auxetic meta-sandwiches with different combinations of soft and hard components are fabricated by 4D printing fused deposition modeling technology for reversible energy absorption applications.

TL;DR: In this paper, the performance of uniform sheet (US) and functionally graded sheet (FG) lattice structures with primitive (P) and gyroid (G) minimal surfaces were fabricated by selective laser melting (SLM) using Ti-6Al-4V powder.

TL;DR: In this paper, the free convection of Al2O3/water nano-fluid in a tilted enclosure is investigated and the effects of magnetic field strength, the variations of Rayleigh number (Ra), radiation parameter, nanoparticles concentration, inclination angle (IA), and aspect ratio (AR) are studied on the heat transfer rate (HTR) and irreversibilities.

TL;DR: In this paper, the authors investigated the convection of a nano-encapsulated phase change materials (NEPCM) suspension in a cavity with a hot wall having a time-periodic temperature.

TL;DR: In this article, a finite element (FE) model was developed and validated by comparing the damage modes and crashworthiness indictors with the dedicated experimental study, and the interactive effects of the hybrid tubes were investigated by analyzing the discrepancies in the deformation pattern and internal energy absorption of each material through validated FE models.

TL;DR: In this article, a series of cells with different densities and configurations were formed by changing the unidirectional size of a uniform lattice cell, and then assembled into a size-graded (SG) lattice structure with varied density and topological configurations.

TL;DR: In this article, a split Hopkinson pressure bar (SHPB) modified with axial and radial confining systems was used to characterize the failure behaviors of hydrostatically confined rocks under combined compression-shear loading.

TL;DR: In this paper, a new class of shell lattice (SL) metamaterials has been proposed for shock absorption, which are ultrastiff, ultrastrong, and possess high specific energy absorption at low relative density.

TL;DR: In this paper, the design methods of the network based functionally graded Gyroid (N-FGG) and sheet-based functionally graded gyroid (S-FFG) structures were presented.

TL;DR: In this article, the residual stress and surface topography obtained by various shot peening treatments were experimentally and theoretically examined, and it was found that the ratio between the layer thickness of compressive stress and the critical depth of maximum stress generally lies in the regime of 3.6-4.3 after shot-peening.

TL;DR: In this article, a regulatory mechanism constituted by an electrically charged coil and a magnet ring is introduced into an HSLDS resonator to devise a semi-active quasi-zero-stiffness (QZS) resonator.

TL;DR: In this paper, a full-scale modeling and nonlinear FEA is presented for large amplitude vibration of sandwich plates with functionally graded (FG) auxetic 3D lattice core.

TL;DR: In this paper, bending, buckling, and free vibration analyses of micro-scaled functionally graded Graphene nanoplatelets reinforced porous nanocomposite annular plate located on the bi-parameter elastic foundation exposed to hygrothermo-mechanical loads are carried out.

TL;DR: In this article, the authors investigated low-velocity impact responses and crashworthiness of different aluminum foam-core sandwich structures and found that multi-layer sandwich structure had much better performance in the crush force efficiency than those with single-layer foam core.

TL;DR: In this paper, a number of metamaterials with perforated architectures possessing the ability to exhibit a plethora of 2D auxetic responses with negative Poisson's ratios ranging from quasi-zero to large negative values (lower than −3.5), stiffnesses, stretchability and surface coverage properties were manufactured.

TL;DR: A cutting condition independent TCM approach for milling with vibration singularity analysis is introduced which utilized a Support Vector Machine model and a transition point identification method (TPIM).

TL;DR: In this paper, a novel acoustic metamaterial beam with periodically variable cross-sections is designed by combining the mechanisms of the Bragg scattering and the locally resonant band-gaps.

TL;DR: In this article, a new MFSSP was proposed to include a multifunctional passive sandwich plate integrated with two active piezoelectric layers, and a mesh-free method was developed to solve the obtained mechanical and thermal stability equations.

TL;DR: In this paper, a membrane-type metamaterial with tunable topological properties was designed and analyzed using the plane wave expansion method, and the theoretical and numerical results showed the existence of topologically protected interface mode in the system.

TL;DR: In this article, the authors investigated the effect of supercell size and defect location on energy localization and harvesting performance of a PnC-based PEH system under elastic waves and showed that there is a trade-off relationship between the fulfillment of resonance formation and the attenuation of evanescent waves.

TL;DR: In this paper, a set of auxetic lattices with enhanced stiffness are proposed by adding a strengthening rib into conventional auxetic unit cells in a direction perpendicular to the reentrant direction.

TL;DR: In this paper, a novel shaking table testing campaign was conducted to assess the tuned mass-damper-inerter (TMDI) vibrations suppression attributes in harmonically excited structures under the combined effect of nonlinear structural response and nonlinear inerter device behavior deviating from the ideal linear inerters developing acceleration-dependent force proportional to the inertance constant.

TL;DR: In this paper, a novel bio-inspired corrugated tube and its derivative structures with varying vertex configurations were proposed, and a theoretical model was developed to predict the mean crushing force of the proposed tubes.

TL;DR: In this paper, the formability and springback properties of W-tempered 7075 aluminum alloys were analyzed using the Marciniak-Kuczyinski forming limit diagram and U-draw bending springback simulations.

TL;DR: In this paper, the authors have investigated the thermal-hydraulic performance of a two-phase non-Newtonian EG/water mixture based nanofluid through a wavy-sinusoidal minitube.

TL;DR: In this paper, the authors presented an analytical approach on the nonlinear magneto-electro-elastic vibration of smart sandwich plate, which consists of a carbon nanotube reinforced nanocomposite (CNTRC) core integrated with two magnetoelectroelastic face sheets.

TL;DR: In this paper, an analytical nonlinear primary resonance solution of functionally graded (FG) porous nanoshells under an external soft harmonic excitation including surface stress effects is presented.

TL;DR: In this paper, a physics-based model was proposed to predict the part porosity in powder bed metal additive manufacturing (PBMAM) per given process parameters, materials properties, powder size distribution.